I've also tried tempering with the save files in the 'My Documents\My Games\Skyrim\saves' folder. I could save the game once or twice afterwards, but after fast-travelling the save bug acts up again. So no progress there...

You may have mods that updated why you were away or were removed and now you have corrupted data in your saves. My mods from steam were remove and placed on nexus. I had not played for several months tho. I can't even get the unofficial patches to update from Nexus. I am constantly getting error 15 when loading up. And my loads say content is missing from my saves. Armor mod was gone so when game started I was nude, lol